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Lm! L M NITED4 STATES PATENT EEICEe MASTIN LEE RISON, OF PARIS, TENNESSEE, ASSIGN OR TO THE PARIS SPRING MANUFACTURING COMPANY, OF SAME PLACE.

SPRING CHAIR-SEAT.

SPECIFICATION forming part of Letters Patent No. 637,667, dated November 21, 1899. Y

Application filed MayYZO, 1899. Serial No. 717,583. (No model.)

To all wtont t may concern:

Be it known that I, MAsTIN LEE RIsoN, a citizen of the United States, residing at Paris, in the county of Henry and State of Tennessee, have invented a new and useful Spring Chair- Seat, of which the following is a specification. My invention relates to furniture-springs, and particularly to a spring-section adapted 'for use as a chair-seat, chair-back, portion of a bed-bottom or mattress, or in any other relation in which a group of cooperative spring elements is required; and the object in View is to provide such a combination of and relation between the spring elements as to accomplish the distribution of weight applied to any portion of the section, and thus enable the parts of the section to retain their shape after continued use.

My invention consists, essentially, of a spring-section comprising an outer frame or support, within which is arranged a series of spring elem ents radiating from a center plate or element, said springs being of conicohelical construction, and preferably have a body portion which is substantially conicosubulate, while the outer ends thereof are substantially conicohemispherical; and furthermore, my inventionl consists in combining with each section a yielding reinforcing device by which pressure may be applied to the center of the section to oppose repression of the latter by a weight to which it may be subjected in use.

Further objects and advantages of this invention will appear in the following description,and the novel features thereof will be partioularly pointed out in the appended claims.

In the drawings, Figure l s'hows the springsection embodying my invention applied in the operative position to a chair to form a chair-bottom and back-spring. Fig. 2 is a sectional View of the spring-section. Fig. 3 is an inverted plain View of the same.

Similar reference characters indicate corresponding parts in all the figures of the drawings.

In the preferred embodiment of my invention as illustrated in the drawings the device consists of a frame 1,which may vary in contour and material to suit the article of furniture in connection with which the springsection is employed, a central button or connecting -plate 2, and a series of radiating spring elements 3, connecting said button or plate with the frame, the body portions of said spring elements being conicosubulate to adapt them to lie in close proximity, particularly when the section is designed for use as a chairbottom, and having their outer ends reduced to form substantially conicohemispherical portions,whereby the outer extremities of the wires forming the spring elements may be engaged with the frame in such a way as to be concealed, and thus held wholly out of contact with the garments of a person occupying the article of furniture to which the device is applied. By this construction it will be seen that the spring elements have enlarged portions 9 near their outer ends, and these convexly-rounded outer portions 9 cause the section to bulge sharply adjacent to the frame, and thus insure that form and relation between the parts which is desirable, particularly in' connection with the seat or back of a chair. In the construction illustrated the attachment of the outer extremities of the springV ends to the frame is accomplished by means of a metallic strip 4, secured to the frame, extending inward slightly beyond the inner surface thereof yand provided with perforations with which the outer hooked or bent extremities of the springs engage; also, in the construction illustrated the central button or plate consists of a metallic disk suitably perforated for engagement with the adjacent inner extremities of the spring elements; but it will be understood that this feature is susceptible of variation to suit the designed use of the section.

In connection with the elements above described when the section is designed for use as a chair-bottom I 'preferably employ a reinforcin g device consisting of a bearing-plate 5, connected with the frame by radial arms 6, and a spiral spring 7, bearing at its upper end against said plate and having its lowermost coil in turn connected with radial tension rods or Wires 8, which hold the reinforcing-sprin g under the desired tension, and thus cause the latter to force the bearing-plate upward against the center of the group of elements forming the spring-section. The ra- IOO . pressed, and thus perform the function of tiesv for preventing displacement when the device is in use.

dial arms 6 serve to maintain the Ybearingplatein its proper position in alinement with the center of Athe spring-section when de- Among the advantages of a-spring-section constructed as described may be mentioned lightness, strength, and durability, and it is obvious, furthermore, that it is of a suitablyventilated construction, and while a covering may be used in connection therewithit is obvio-us that the relative arrangement of the parts is such as to adapt the section for exposure, inasmuch as the extremities of thel spring elements are concealed to avoid ,injury to the garments of the occupant of the article of furniture. Preferably the bearingpiate underlaps the adjacent inner coils of the spring elements, whereby the upward pressure thereof serves to add to the bulging eect of the structure. i Various changes in the form, proportion, size, and minor details of construction within the scope of the appended claims may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention. t

Having described my invention, what I claim is- 1. A spring-section for furniture, comprising a frame, and a series of conicohelical spring elements radiating from a common center and attached at their outer extremities to theframe, said spring-secti`ons having enlarged portions near their outer ends, substantially as specified.

2. A spring-section for furniture, comprising a frame, and a series of conicohelical spring elements radiating from a common center andl attached at their outer endsl to said frames, the-body portions of said spring elements being conicosubulate and having their outer ends reduced, substantially as specified. p l

3. A spring-section for furniture, comprising a frame, and a series of conicohelical spring elements radiating from a common centerand attached at their outer ends to said frame, the body portions of said spring elements being conicosubulate, and the outer reduced ends thereof approximately conicohemispherical, substantially as specified.

4. A spring-section for furniture having a frame, and a series of conicohelical spring elements radiating fro'rnv a commonv center and provided with convexly-rounded outer enlarged portions having reduced ends terminally attached to the frame, substantially as specified. v

5. A springsectionfor furniture comprising a frame, and a series of conicohelical spring elements radiating froma common center and attached at their outer ends to said frames, the body portions of said spring elements being conicosubulate,and the outer ends approximately conicohemispherical, whereby convexly-enlarged portions are kformed near their outer ends, substantially' `as specified.

6. A spring-section for furniture, comprisinga frame provided with a perforated strip, a series of conicohelical spring elements radi ating from a common center and attached at their outer ends with said perforated strips, the body portions of said spring elements having enlarged portions near their outer ends, and a central button connecting the in ner extremities of the spring elements, in combination with a spring reinforcing device bearing upon said section in a direction perpendicular to the plane thereof and adjacent to its center, substantially as specified.

7. A spring-section for furniture, comprising a frame, a series of conicohelical spring elements radiating from a common center and `attached at their, outer ends to said frame, and a centralbutton connecting the inner extremities of the spring elements, in combination with a spring reinforcing device comprising a bearingplate arranged in contact with the spring-section at its center, arms or tie-rods radially connecting said bear ing-plate with the frame, a spring arranged at its inner end in contact with said bearingplate, and tension-rods radiating from the outer coil of the springand connected withthe frame, substantially'as specified.

. In' testimony that I claim the foregoing as my own` I have hereto aflixed my signature in the presence of two witnesses.

lMASTIN LEE RISON.

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